Amazfit GTR 4 vs Amazfit T-Rex Ultra
Side-by-side specifications, scores and verdict.
Quick Verdict
Both smartwatches deliver impressive battery longevity and AMOLED displays, but serve different user profiles. GTR 4's 1.43-inch AMOLED screen edges ahead with 466x466 resolution versus T-Rex Ultra's 454x454, while weighing just 34g compared to 89g. Connectivity favors GTR 4 with NFC and WiFi support, useful for payments and quick syncing. However, T-Rex Ultra targets adventure enthusiasts with military-grade durability, 10 ATM water resistance with free-diving certification, and exceptional 80-hour GPS battery for extended expeditions. GTR 4 excels for everyday wear with superior portability and practical features like contactless payments. Performance and health tracking are virtually identical. At $199, GTR 4 delivers exceptional value for mainstream users seeking elegance and battery life. T-Rex Ultra justifies its $449.99 premium only for serious outdoor/diving athletes. For most buyers, GTR 4 is the smarter choice.
Full Specifications
| Specification | Amazfit GTR 4 | Amazfit T-Rex Ultra |
|---|---|---|
| Software | Zepp OS | Zepp OS 2.0 |
| Body | ||
| Weight | 34 g | 89 g |
| Case material | Aluminum alloy | Stainless steel bezel, fiber-reinforced polymer case |
| Water resistance | 5 ATM | 10 ATM, ISO 22810 certified for free-diving to 45m |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 14 days normal, 26 days basic watch mode | Up to 20 days typical use, 80 hours GPS |
| Display | ||
| Size | 1.43 inch | 1.39 inch |
| Type | AMOLED | AMOLED |
| Always-on display | ||
| Resolution | 466 x 466 | 454 x 454 |
| Processor | ||
| RAM | 1 GB | — |
| Chipset | Huangshan No.2 | — |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.0 |
Category Scores
Pros & Cons
Amazfit GTR 4
Pros
- Excellent 14-day battery life with always-on AMOLED display
- 150+ built-in sports modes for broad activity tracking
- Dual-band GPS with four satellite systems for accurate positioning
- Attractive round design with physical crown and quick-release bands
- Affordable at $199 with Wi-Fi and NFC for payments
Cons
- No ECG sensor or skin temperature tracking
- Zepp OS has a limited third-party app ecosystem
- Bluetooth phone calls require the Zepp app active on the phone
- Health tracking accuracy lags behind Apple, Samsung, and Garmin
Amazfit T-Rex Ultra
Pros
- Excellent 20-day battery life with always-on display
- Dual-band six-satellite GPS for high accuracy
- Rugged design with 15 military-grade certifications
- Free-diving rated to 45 meters
- Offline maps with route import support
Cons
- No ECG, skin temperature, or NFC payments
- No Wi-Fi or cellular connectivity
- Zepp OS app ecosystem is limited
- Heavier than most smartwatches at 89g
- No third-party app store
Related Comparisons
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